Yuto and Lian are at train stations 1,880 kilometers apart. Yuto boards a train heading east at an average speed of 220 kilometers per hour. At the same time, Lian boards a train heading west on a parallel track at an average speed of 250 kilometers per hour. How far has Lian traveled when the two trains pass each other?
Then distance traveled by Yuto to meeting point = 1,880 - D
Times taken by both to travel to meeting point are equal
Therefore, we get: 1880 - D/220 = D/250
250(1,880 – D) = 220D ------ Cross-multiplying
470,000 – 250D = 220D
D, or distance Lian traveled = -470000/-470, or 1000 km